libstdc++-v3/testsuite/27_io/basic_filebuf/underflow/wchar_t/5.cc

   1 // { dg-require-namedlocale "se_NO.UTF-8" }
   2
   3 // 2003-09-04  Petur Runolfsson  <peturr02@ru.is>
   4
   5 // Copyright (C) 2003-2019 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 // 27.8.1.4 Overridden virtual functions
  23
  24 #include <locale>
  25 #include <fstream>
  26 #include <cstdio>
  27 #include <testsuite_hooks.h>
  28
  29 // Test that unbuffered really means unbuffered for UTF-8
  30 void test05()
  31 {
  32   using namespace std;
  33   const char* name = "tmp_underflow-5";
  34
  35   wfilebuf fb;
  36   fb.pubsetbuf(0, 0);
  37   fb.pubimbue(locale("se_NO.UTF-8"));
  38
  39   FILE* file = fopen(name, "w");
  40   setvbuf(file, 0, _IONBF, 0);
  41   fputs("abcde", file);
  42
  43   fb.open(name, ios_base::in);
  44   VERIFY( fb.sbumpc() == L'a' );
  45
  46   fseek(file, 1, SEEK_SET);
  47   fputc('0', file);
  48
  49   VERIFY( fb.sbumpc() == L'0' );
  50   VERIFY( fb.sbumpc() == L'c' );
  51
  52   fputc('1', file);
  53   fputc('2', file);
  54
  55   VERIFY( fb.sbumpc() == L'2' );
  56   VERIFY( fb.sbumpc() == L'e' );
  57   VERIFY( fb.sbumpc() == WEOF );
  58
  59   fputc('3', file);
  60   fputc('4', file);
  61
  62   VERIFY( fb.sbumpc() == L'4' );
  63   VERIFY( fb.sbumpc() == WEOF );
  64
  65   fb.close();
  66   fclose(file);
  67 }
  68
  69 int main()
  70 {
  71   test05();
  72   return 0;
  73 }